Katech A4122 - Billet Steel Main Caps, LS

Upgrade your block for maximum durability. Katech caps are positioned with two, 1/4-inch steel dowels rather than the OEM aluminum locating register walls. We recommend using ARP Main studs with these caps, see link below. • Manufactured from 1/2" thick steel • Girdle to be profiled to fit over engine main caps without the need of spacers • Designed to work with up to a 3.40 • Includes necessary hardware • Works with any standard Melling M68 or M68HV oil pump